Table 1. Baseline characteristics of the included patients at enrollment.
| EARLY | LATE | P value | TOTAL | |
|---|---|---|---|---|
| n = 79 | n = 72 | early vs late | n = 151 | |
| Age (years) | 62.8 ± 11.6 | 60.7 ± 10.9 | 0.2 | 61.8 ± 11.3 |
| Male sex | 49 (62%) | 51 (71%) | 0.3 | 100 (66%) |
| Ethnicity | 0.8 | |||
| Caucasian | 57 (72%) | 53 (74%) | 110 (73%) | |
| Non-Caucasian | 22 (28%) | 19 (26%) | 41 (27%) | |
| Height (m) | 1.67 ± 0.09 | 1.69 ± 0.09 | 0.1 | 1.68 ± 0.09 |
| Weight (kg) | 78.6 ± 13.5 | 76.6 ± 14.6 | 0.4 | 77.7 ± 14.0 |
| BMI (kg/m2) | 28.3 ± 4.6 | 26.7 ± 4.0 | 0.02* | 27.6 ± 4.4 |
| <18.5 | 0 (0%) | 1 (1%) | 1 (1%) | |
| 18.5–24.9 | 20 (25%) | 23 (32%) | 43 (28%) | |
| 25–29.9 | 34 (43%) | 33 (46%) | 67 (44%) | |
| 30+ | 25 (32%) | 15 (21%) | 40 (26%) | |
| Primary kidney disease | 0.9 | |||
| Diabetic nephropathy | 27 (34%) | 24 (33%) | 51 (34%) | |
| Hypertension/ Renovascular disease | 13 (16%) | 11 (15%) | 24 (16%) | |
| Glomerulonephritis | 11 (14%) | 10 (14%) | 21 (14%) | |
| Polycystic kidney disease | 5 (6%) | 8 (11%) | 13 (9%) | |
| Other | 23 (29%) | 19 (26%) | 42 (28%) | |
| Failed transplant | 1 (1%) | 2 (3%) | 0.5 | 3 (2%) |
| PD modality | 0.6 | |||
| CAPD | 76 (96%) | 68 (94%) | 144 (95%) | |
| APD | 3 (4%) | 4 (6%) | 7 (5%) | |
| Initial dialysis dose | 0.8 | |||
| Incremental | 11 (14%) | 9 (13%) | 20 (13%) | |
| Full | 68 (86%) | 63 (88%) | 131 (87%) | |
| Smoking status | 0.9 | |||
| Never | 31 (39%) | 27 (38%) | 58 (38%) | |
| Current | 5 (6%) | 5 (7%) | 10 (7%) | |
| Former | 43 (54%) | 40 (56%) | 83 (55%) | |
| Comorbidities | ||||
| Diabetes mellitus | 35 (44%) | 28 (39%) | 0.5 | 63 (42%) |
| Hypertension | 72 (91%) | 67 (93%) | 0.7 | 139 (92%) |
| CVD | 30 (38%) | 26 (36%) | 0.8 | 56 (37%) |
| Medication | ||||
| Diuretic | 47 (59%) | 29 (40%) | 0.02 | 76 (50%) |
| ACE inhibitor/Angiotensin II blocker | 50 (63%) | 50 (69%) | 0.4 | 100 (66%) |
ACE = angiotensin-converting enzyme; APD = automated peritoneal dialysis; BMI = body mass index; CAPD = continuous ambulatory peritoneal dialysis; CVD = cardiovascular disease (defined as a composite of ischemic heart disease, congestive heart failure and peripheral vascular disease); PD = peritoneal dialysis.
Values are expressed as frequency (percentage) for categorical variables, mean ± standard deviation for normally distributed continuous variables, and median (interquartile range) for non-normally distributed continuous variables.
There were no missing data for all variables reported.
*Reported P value for BMI as a continuous variable compared between groups. P value for BMI categories between groups = 0.3.